Alright, I have a bunch of possible WIPs, but I’ll give you a couple of my favorites.
In both there are fantasy worlds. First, one of my WIPs is about three kids with special gifts, destined to save the human race from dragons. Another one is specifically dragons, no humans, and is about a dragon queen’s quest to regain her lost memories. I’ve always wanted to try historical fiction, too, so your idea about WW1 sounds amazing!
How great is your light when you sacrifice all you have for those who have nothing to give.